silent fail on npm/yarn install

[marcmeans]

generator.runInstall('yarn', [], () => { generator.spawnCommandSync('npm', ['run', 'test']); });

When my generator fires these commands I silently fail through the plugin. Anyone know if I'm doing anything crazy? It works fine on my command line.

[SamVerschueren]

Have to test this behaviour. I'm quite busy at the moment with some other work, so any help on this topic would be appreciated.